Re: FFT class or routines

"MeMyselfAndI" <agp001@xxxxxxxxxxxxxxx> wrote in message
news:433ab0bf$0$6112$afc38c87@xxxxxxxxxxxxxxxxxxxxxxx

> I want to do an FFT analysis of audio data in a professional
> music production app. I've been trying to use a class called
> RealFFT, but I don't have the technical knowhow to peice the
> audio back together after the IFFT. I was wondering if there
> is some Delphi code of some component out there which will
> make it easy to get the frequency info and then convert that
> back into PCM.

The Fourier Transform is its own inverse, except for a constant
factor of 2*pi IIRC. And it's common to multiply by the square
root of that to _make_ it its own inverse exactly.

Groetjes,
Maarten Wiltink


.

Relevant Pages

  • FFT class or routines
    ... I want to do an FFT analysis of audio data in a professional music production app. ... I've been trying to use a class called RealFFT, but I don't have the technical knowhow to peice the audio back together after the IFFT. ...
    (alt.comp.lang.borland-delphi)
  • Re: FFT class or routines
    ... > I want to do an FFT analysis of audio data in a professional music production ... > app. ... such as an Eq type display. ...
    (alt.comp.lang.borland-delphi)